Stitch-measurer for sewing-machines.



P. SJOSTROM.

STITCH MEASURER FOB SEWING MACHINES.

APPLICATION man DEC. 13. I915.

1,21 9,597. Patented Mar. 20, 1917.

2 SHEETS-SHEET I.

P. SJOS'TROM.

STITCH MEASURER FOR SEWING MACHINES. APPLICATION FILED 11mm. 1915.

1,21 9,597. Patented Mar. 20, 1917. 2 SHEET$-SHEET 2- a 6 Fig.4.

uum wAamMJulv. u c.

Cit

from the needle carrier 45, said outward movement being limited by the stop member 49 mounted in the tubular member 50 se cured to the frame 23.

The tubular member 50 has a diametral slot 51 at one end in which the blade of a screw driver is adapted to be positioned to prevent the turning of said member 50 when the clamping nut 52 is being screwed thereon.

Between the nut 52 and the boss 53 projecting from the frame 23 is positioned a curved plate 54, said plate being adapted to be clamped in position by the nut 52.

If it is desired to adjust the position of this plate about the axis of the member the nut 52 is moved outwardly su'l'liciently to permit such adjustment and the plate 54: is then again clamped.

The stop member 41-9 is threaded to the tubular member 50 and when rotated is moved endwise thereof so that its inner end will control the outward movement of the awl carrier 40.

The rotation of the member 49 is effected by means of the arm 55 clamped to the outer end of the member -19 by means of the clamping nut 56 threaded to the reduced end 57 of said member.

The movement of the arm 55 in opposite directions is limited by the ears 58-59 projecting outwardly from the scale plate 5%.

The plate 54 is provided with a plurality of indentations 60 with a numeral 61 opposite each indentation. The arm 55 is provided with a projection 62 adapted to engage with either of the indentations 60 to lock the arm 55 in adjusted position.

Each numeral 61 indicates the number of stitches that will be formed in the work to every inch when the arm 55 is registering with an indentation 60 opposite said numeral.

It is obvious that the more stitches that are formed to an inch the shorter these stitches will. be, and vice versa.

The length oi. the stitches is regulated by the movement of the awl carrier 40, and it is self-evident that this movement is controlled by the position of the inner end of the member 49, which position may be varied at will by the arm 55.

In the operation of the machine the oscillation of the segment 27 will impart oscillatory movement to the gear 29, and through this gear 29 to the main driving shaft 30. The pin 3 1- on the gear 2%. will coaet with the shoulders 32 and 33 ot the cam member 35 and move this cam member 35 at the end of the movement of the pin 34 in either direction. The movement of the cam 35 will operate the lever 37 moving it about its pivot 38 and cause the bearing member 39 to force the awl carrier 40 toward the needle carrier 45, the awl ll at this time being in the work and causing the work to be fed so that the puncture therein caused by the awl will be brought into the plane of the needle 47, the awl ll on completing its reverse movement being returned to its normal position by means of the spring .1-8. This reverse movement of the awl carrier does not occur until the point of the awl is entirely free from the under face of the work. Any required :r'eed may be obtained by adjusting the feed controlling member 49.

The machine is provided with the usual \vork support 118, the shuttle 1&5 and all the necessary instrumentalities for the formation. of the stitch, but as these devices form no part of the present invention they are not herein described.

It is believed that the operation and many advantages oi? this machine will be fully understood from the foregoing description.

Having thus described my invention, I claim:

1. In a machine of the class described, the combination of an oscillating member; a work feeding member vertically mounted thereon; a stop member to limit the outward movement of said work feeding member about its pivot; and means for adjusting said stop member endwise a predetermined amount.

2. In a machine of the class described, the combination of a vertically oscillating awl carrier having also a lateral swinging move ment; a stop member to limit the outward swinging movement of said awl carrier; and means for adjusting said stop member endwise a predetermined amount.

In a machine of the class described, the combination of an oscillating awl carrier; a support; a stop member threaded to said support; and means for rotating said stop member and efi'ecting endwise movement thereof.

-l-. In a machine of the class described, the combination of an oscillating awl carrier; a support; a stop member threaded to said support; a curved plate provided with a plurality of registering members; and an arm secured to and rotatable with said stop member and adapted to coact with either of said registering devices.

5. In a machine of the class described, the combination of an oscillating awl carrier; a support; a stop member threaded to said support; a curved plate provided with a plurality oi indentations; and an arm secured to and rotatable with said stop member and provided with a projection adapted to coact with either of said indentations.

6. In a machine of the class described, the combination of an oscillating awl carrier; a support; a stop member threaded to said support; a curved plate provided with a plurality of registering members and having an outwardly extending arm-engaging ear at each end; and an arm secured to and rotatable With said stop member and adapted to coact With either of said registering devices.

7. In a machine of the class described, the combination of an oscillating aWl carrier; a fixed tubular member; a stop member threaded therein; and means for rotating said stop member and efi ecting endwise movement thereof.

8. In a machine of the class described, the combination of an oscillating aWl carrier; a fixed tubular member; a stop member threaded therein; a curved scale plate clamped on said tubular member; and means coacting With said plate for rotating said stop member and effecting endWise movement thereof.

Signed by me at Lynn, Mass, this 19th day of October, 1915.

PETER SJ OSTROM.

Vitnesses WALTER E. LOMBARD, JOHN F. MCGOWAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

